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(No Model.) 2 SheetsSl 1eet 1.

J. PLAYER. VALVE PORCUMP OUND ENGINES.

No. 481,057. Patented Aug. 16, 1892.

FICLZ.

4 a I F Wrwsscs 94 Q/ UNITED STATES PATENT OFFICE.

JOHN PLAYER, OF DUNKIRK, NElV YORK, ASSIGNOR TO THE BROOKS LOOOMOTIVEVORKS, OF SAME PLACE.

VALVE FOR COMPOUND ENGINES SPECIFICATION forming part of Letters PatentNo. 481,057, dated August 16, 1892.

Serial No. 429,267. (No model.)

T0 on whom it may concern: v

Be it known that I, JOHN PLAYER, a resident of Dunkirk, Chautauquacounty, New York, have invented a Combined Admission and InterceptingValve for Compound Engines, of which the followingis a specification.

My invention relates to compound locomotive or other engines of thattype in which for the purpose of obtaining full power at startinghigh-pressure steam is employed in both cylinders simultaneously, thatportion which is admitted to the large or low-pressure cylinder beingautomatically reduced in pressure and controlled at such pressure thatthe mean effective pressure on both sides of the engine is equalized orregulated in any desired ratio.

My present invention is a modification of the valve mechanism claimed inthe applicationfiled by me on February 24, 1892, Serial No. #122,630,and relates particularly to an intercepting-valve and anadmission-valve.

The obj ectof my invention is toso combine the two valves that theintercepting-valve will keep the admission-valve closed when the engineis compounding, and that the admission-valve will act upon theinterceptingvalve at starting and will wire-draw steam passing from thesupply to the low-pressure cylinder until such time when the exhaustfrom the high-p ressure cylinder will overcome the reduced pressure inthe low-pressure cylinder, causing the intercepting-valve to open and toclose the admission-valve.

In the accompanying drawings, Figure l is a transverse sectional view ofsuflicient of a locomotive to illustrate my invention. Fig. 2 is asectional view of the valve structure, showing the admission-valve openand the in tercepting-valve closed. Fig. 3 is asectional View of thevalve structure, showing the intercepting-valve open andtheadmission-valve closed. Fig. 4 is a sectional perspective view of theintercepting-valve. Fig. 5 is a sectional perspective view of theadmissionvalve.

Referring to Fig. 1, A is the high-pressure cylinder, and B thelow-pressure cylinder. A isthe high-pressure valve-chest, andBthelowpressure valve-chest. a is the live-steam inlet to thehigh-pressure cylinder connected to the main steam-supply a through thepipe a a is the exhaust-passage from the highpressure cylinder. O is thereceiver-pipe connected with the hi glrpressure exhaust-passage a andthe low-pressure inlet-passage b. b is a pipe communicating with themain steamsupply a and the admission-valve mechanism describedhereinafter, whereby live steam under reduced pressure may be admittedto the low-pressure cylinder. 1) is the exhaustpassage for thelow-pressure cylinder communicating with the exhaust-nozzle.

I will now describe the valve mechanism to which my inventionparticularly relates.

D is the valve-casing projecting into the receiver-pipe O, and in thiscasing is mounted the intercepting-valve E. This intercepting-valve whenclosed seats itself against a seat 0, cutting off communication betweenthe high-pressure end of the receiver-pipe and the low-pressure end. Theinterceptingvalve E has a head 6 and a rearward extension 6, providedwith packing and works withinthe casing D. This rearward extension isconnected to the head e by a perforated section e the perforations insaid section allowing live steam to enter the lowpressure steam-chestafter passing through the admission-valve.

Projecting into the casing D is a chest F, with which communicates thepipe I) from the live-steam supply a. The chest is divided into twoportions in the present instance f f by a partition, and in this part1-tion is a passage f forming a communication between the two chambers ff.Adapted to the chamber f is an admission-valve G, having a head g, whichis adapted to a seat 1 in the chest F, so that when the valve is closedagainst the seat live steam will be cut off. In the valve G are passagesg, through 'which the live steam is wire-drawn as it enters the spacebetween the said valve and the intercepting-valve prior to its enteringthe low-pressure valve-chest. At the back of the intercepting-valve inthe present instance is a projection 6 which, when the valve is open, asshown in Fig. 3, enters the chest F and rests against theadmission-valve G, keeping said valve to its seat. The valve G islimited in its stroke bya stop-pin h, which passes through slots in thevalve.

The operation of myimproved valve structure is as follows: On starting,steam is admitted from the main supply a. through the pipe I) to theadmission-valve, causing it to open and push the intercepting-valve theamount of its travel. The steam then passing the valve G causes theintercepting-valve E to close. The steam passing through theadmissionvalve, being reduced in pressure by throttling, passes into thelow-pressure end of the receiver C and operates upon the piston of thelow-pressure cylinder. When the pressure on the high-pressure side ofthe interceptingvalve becomes equal to or slightly in excess of that onthe low-pressure side, it causes the intercepting-valve to open andoperate against the admission-valve, at the same time closing theadmission-valve, preventing any further escape of high-pressure steaminto the receiver while the engine is working.

The valve structure may be arranged in the steam-admission passage ofthe low-pressu re cylinderinstead of in the upper portion of thereceiver, as the receiver in fact extends from the high-pressu revalve-chest to'thelow-pressure valve-chest, and the valve structure maybe placed at any point betweeen the two chests.

I claim as my invention- 1. In a combined admission and interceptingvalve for compound engines, the combination of the receiver-casingforming a communication between thehigh andthe low pressure cylinders,an intercepting-valve therefor, a live-steam passage communicating withthe low-pressure end of the receiver, and admission-valve therefor,capable of movement independently of the intercepting-valve, butarranged in such relation to the interceptingvalve that the saidadmission-valve will be opened and the intercepting-valve will be closedby the live steam, said admission-valve having openings through whichthe steam is wire-drawn, substantially as described.

2. The combination, with the receiver pipe or passages of acompoundlocomotive or other engine, of the intercepting-valve having anannular balancing device working within its casing and having one seatto cut ofi the high-pressure steam from the receiver and having aprojection on its back, with the admission-valve Working within itscasing and being caused to close by the operation of the projection orstop on the back of the intercepting-valve, said admission-valve casingforming the interior of the balancing-chamher for the intercepting-wake,said balancing-chamber being connected to the atmosphere, as and for thepurpose set forth.

3. The combination, with the receiver pipe orpassages of acompoundlocomotive or other engine, of the live-steam pipe connecting with thead mission-valve chamber, the admissionvalve chamber, theadmission-valve, its seat. its stop, its steam passages and extension,with the projection on the back of the intercepting-valve, having theannular balancing device and stean1-passages, said interceptingvalveworking within its casing externally and outside of the projection onthe admission-valve chamber, said projection forming thebalancing-chamber for said interceptingvalve, which is connected to theatmosphere, as and for the purpose set forth.

4. The combination, with the receiver pipe or passages of a compoundlocomotive or other engine, of the intercepting-valve chamber formedexternally by its own casing and internally by the admission-valvechamber and being connected to the atmosphere, the intercepting-valvehaving the annular balancing device working within said chamber, itssteam-passages, its seat closing against the receiver, with theprojection on the back end of the intercepting-valve, arranged to closethe admission-valve against its seat and the admission-valve closingagainst its seat,workin g within its chamber and regulated in travel byits stop, as and for the purpose set forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

J OI-IN PLAYER.

WVitnesses:

WILLIAM D. CoNNnR, HENRY I-IoWsoN.

